I was having this problem and spent long long days for fixing the same and finally got the job done. Am talking about the error “Packet scheduler miniport. Error code 31. Can't load driver.” I use to get this error everytime and whenever I checked my Device manager it was always showing me Yellow exclamation mark next to Packet scheduler miniport though I did whatever to fix it.
After long researches and hard work I finally managed to fix it and want to share the same here so that if anyone else facing it can be helped with the following steps:
1, Open Device Manager and right click on the Packet Scheduler Miniport with the yellow exclamation mark next to it.
2, Click on Properties.
3, Click on the Driver tab.
4, Click on Update Driver.
5, Choose "Yes this time only", and click on next.
6, Choose "Install from a list or specific location" Advanced, and click on next.
7, Choose "Don't search, I will choose the driver to install". Click next.
8, In the box under "Network adapter" click on "Packet scheduler miniport" and then click on next.
The driver will then install and the problem will fixed. Take a look in Device manager and you will see the exclamation mark has disappeared.
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